This can be – clicking a button, submitting a form with contact details (AJAX elements), scrolling a page, playing a video, downloading a presentation brochure, clicking on a banner, counting the number of comments on the site or phone calls, copying an e-mail field, etc.
Event Google Analytics (GA)
Google Analytics events are designed to track user interactions with any elements of the site regardless of page views or screens.
Google Ads
WIKI: random terms